package com.spring.campus_express_delivery.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//拦截器实现跨域方案解决
import org.springframework.stereotype.Component;
//https://zhengkai.blog.csdn.net/article/details/80364904
@Component
public class CorsFilter implements Filter {//全局解决跨域问题
    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT, GET");
        response.setHeader("Access-Control-Max-Age", "3600");
        //response.setHeader("Content-Disposition","attachment;filename=filename.xls");
        //response.setContentType("application/msexcel");
        //response.setHeader("Content-disposition", "attachment");
        // 解决token被过滤问题 ： https://www.cnblogs.com/hanshuai/p/6979478.html
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with,Authorization,token");//就在这里加了个token Authorization
        chain.doFilter(req, res);
    }
    @Override
    public void init(FilterConfig filterConfig) {}

    @Override
    public void destroy() {}
}